V.A.N.S. (Vault-Tec Assisted Navigation System) is a perk in Fallout 4.
The Vault-Tec Navigational System uses V.A.T.S. to show the way! Enter V.A.T.S. at any time to see the path leading to your closest quest objective.
A second rank, added by Nuka-World simply unconditionally increases Perception by 2.